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Cephalopods

      A cephalopod is any member of the molluscan class Cephalopoda (Greek plural Κεφαλόποδα (kephalópoda); "head-feet"). These exclusively marine animals are characterized by bilateral body symmetry, a prominent head, and a set of arms or tentacles (muscular hydrostats) modified from the primitive molluscan foot. Fishermen sometimes call them inkfish, referring to their common ability to squirt ink. The study of cephalopods is a branch of malacology known as teuthology. Cephalopods became dominant during the Ordovician period, represented by primitive nautiloids. The class now contains two, only distantly related, extant subclasses: Coleoidea, which includes octopuses, squid, and cuttlefish; and Nautiloidea, represented by Nautilus and Allonautilus. In the Coleoidea, the molluscan shell has been internalized or is absent, whereas in the Nautiloidea, the external shell remains. About 800 living species of cephalopods have been identified. Two important extinct taxa are the Ammonoidea (ammonites) and Belemnoidea (belemnites).

Source: http://en.wikipedia.org/wiki/Cephalopod
Anarcestes p6437
Anarcestes PP686
Anarcestes p3744
Anarcestes p5037
Anarcestes p6436
Anarcestes PP682
Ancyloceras (Audouliceras) fallauxiVašíček (1972), Pl. VII, fig. 1 ZV30
Anetoceras (Anetoceras) solitariumAD, Chlupáč a Turek (1983), použit při popisu Ich5362
Anetoceras (Anetoceras) solitariumChlupáč a Turek (1983), Pl. 1, fig. 10 Ich5257
Anetoceras (Anetoceras) solitariumChlupáč (1976), Pl. 1, fig. 2 Ich5166
Anetoceras (Anetoceras) solitariumChlupáč a Turek (1983), Pl. 1, fig. 3 Ich5258
AnetocerasChlupáč a Turek (1983), Pl. I, fig. 11 JB324
Anetoceras (Teneroceras) hunsruechianumChlupáč (1983), fig. 3B, Pl. 3, fig. 5 Ich5167
Anetoceras (Teneroceras) hunsrueckianumChlupáč a Turek (1983), Pl. 3, fig. 7 Ich5405
Anetoceras (Teneroceras) hunsrueckianumAD, Chlupáč a Turek (1983), použit při popisu Ich5379
Anetoceras (Teneroceras) hunsrueckjanumAD, Chlupáč a Turek (1983), použit při popisu Ich5292
Anetoceras (Teneroceras) hunsrueckjanum Ich5293
Anetoceras (Teneroceras) oriensAD, Chlupáč a Turek (1983), použit při popisu Ich5467
Anetoceras (Teneroceras) oriensChlupáč a Turek (1983), Pl. 2, fig. 9 Ich5368
Anetoceras (Teneroceras) oriensChlupáč a Turek (1983), Pl. 2, fig. 7 Ich5363
Virtual museum of the Czech Geological Survey, www.geology.cz, (C) Czech Geological Survey, 2011, v.0.99 [13.12.2011]